Working mainly during the 1920s, Vertov promoted the concept of kino-pravda, or film-truth, through his newsreel series. His driving vision was to capture fragments of actuality which, when organized together, showed a deeper truth which could not be seen with the naked eye. In the "Kino-Pravda" series, Vertov focused on everyday experiences, eschewing bourgeois concerns and filming marketplaces, bars, and schools instead, sometimes with a hidden camera, without asking permission first.